Improvement in saws



N0. 144,344/ Patented Nov-4,1873.

illllllllllllllIlllllIlllllllllllllllllllllllllll llii UNITED STATESA'rE'r ERNEST MARX, OF NEW YORK, N. Y.

IMPROVEMENT IN SAWS.

Specification forming part of Letters Patent No. 11 M344, dated November4, 1873 application filed April 25, 1873.

To all whom it may concern:

Be it known that I, ERNEST MARX, of the city, county, and State of NewYork, have invented a new and useful Improvement in Saws; and I dohereby declare the following to be a full, clear, and exact descriptionthereof, which will enable those skilled in the art to make and use thesame, reference being had to the accompanying drawing forming part ofthis specification, in which drawing- Figure 1 represents a sectionalface view of myinvention. Fig. 2 is a transverse section of the same ina larger scale than the previous figure.

Similar letters indicate corresponding parts.

This invention relates to a saw which is composed of a series of narrowflat blades, which are secured together in a suitable clamp, each ofsaid blades being beveled olf at its ends in such a manner that when theblades are fastened in their clamp their ends form a series of teeth,and when these teeth are dull they can readily be sharpened on agrindingstone. The clamp consists of two semicircular rods, one or bothof which is provided with a groove, extending throughout its wholelength, and intended to receive pins projecting from the several blades.On the ends of said rods are fitted sleeves, which are pressed towardeach other by screw-handles, and the inner edges of these sleeves areprovided with a series of notches of varying depth, in such a mannerthat by means of said sleeves the inclination of the blades can beincreased or diminished; or, if desired, the blades can be illclined tosuch a degree that their ends present an unbroken face, ready to besharpened on a grinding-stone.

In the drawing, the letter A designates a clamp, which is composed oftwo semicircular rods, a a, which are secured together at their ends byscrews 1) b, and which are so connected that an opening is left betweenthem for the reception of the blades B, which con stitute my saw. Eachof these blades is provided with a pin, 0, which projects into a groove,(1, in one of the rods a, so that by means of said pins the blades areretained in the clamp, while they can be freely turned in any desiredinclination. On the ends of the clamp A are fitted sleeves O, which areforced toward each other by handles D, that are provided with internalscrew-threads to engage with the ends of the clamp, as shown in Fig. 1,so that by turning these handles in the proper direction the sleeves arecaused to compress the blades B, edge to edge. The ends of the blades Bare beveled off, so that, when said blades are arranged in relation toeach other as shown in Fig. 1, a saw is produced, the teeth of which areformed by the ends of the blades. The sleeves G are provided in theirinner ends with notches c, of different depths, and just wide enough toreceive the last blades. The notches in the sleeves are arranged inpairs diametrically opposite to each other, and the notches constitutingeach pair are of different depths, so that the blades B, on beingpressed into said notches, will assume an oblique position, and, byturning the sleeves so as to bring difi'erent pairs of notches intooperation, the inclination of the blades can be increased or diminished,as may be desirable. One pair of notches in each sleeve is so adjustedthat when these pairs are brought into working position the blades Bwill be inclined to such a degree that their edges form unbroken lines,and that by clamping the blades in this position their edges can bereadily ground off and sharpened with little trouble or loss of time.

The great advantage of my saw over ordinary saws is, that my blades Bcan be made as hard as may be desirable, and that the same can besharpened on a grindingstone and without the use of files. Furthermore,by adjusting the inclination of the blades B, my saw can be readilyfitted for cutting different ma terials.

What I claim as new, and desire to secure by Letters Patent, is-- 1. Asaw composed of a series of blades, B, secured together in a clamp, A,substantially as shown and described.

2. The sleeves 0, provided in their ends with notches e, in combinationwith the clamp A, blades B, and handles D, substantially as shown anddescribed.

ERNEST MARX.

YVitnesses W. HAUFF, E. F. KASTENHUBER.

